In DNA, each nucleotide consists of a deoxyribose (red licorice), a phosphate (marshmallow), and a nitrogenous base (Skittle). It is important that the deoxyribose and phosphates make up the back-bone and that the bases are bound to the deoxyribose.
The Skittle bases are as follows:
- Thymine (T) - Purple
- Adenine (A) - Red
- Guanine (G) - Green
- Cytosine (C) - Yellow
Based on the original stand of DNA, the complimentary strand of DNA was created using the correct base pairs: G to C, C to G, T to A, A to T.
In this example, the students were assigned the sequence CAGCA and determined the complimentary sequence GTCGT.
The original DNA strand (left side) was glued in place for a later activity (transcription).
Unit 4: Genetics & Heredity